using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var runTests = true;

        if (runTests) {

            Console.WriteLine("Running tests...");

            TestClass testRunner = new TestClass();

            testRunner.RunTests();

        } else {

            var sillyPrime = GetNextPrime();

            Console.WriteLine("Running primes");

        }

    }

    public static BigNumber GetNextPrime() {

        return new BigNumber();

    }

}

​

public class BigNumber {

    public List<int> numbers;

    public BigNumber() {

    }

    public BigNumber(BigNumber clone) {

        numbers = clone.numbers.ToList();

    }

    ///Assumes the new number is same size or smaller

    public BigNumber Add(BigNumber addend) {

        int carryOver=0;

        BigNumber result = new BigNumber(addend);

        for (int i = 0; i < result.numbers.Count(); i++) {

        }

        return result;

    }

    public override bool Equals(object obj) {

        bool areEqual = true;

        BigNumber cast = (BigNumber)obj;

        if (cast.numbers.Count() != this.numbers.Count()) {

            return false;

        }

        for (int i = 0; i < this.numbers.Count(); i++){

            if (this.numbers[i] != cast.numbers[i]) {

                return false;

            }

        }

        return areEqual;

    }

}

​

public class TestClass{

    public void RunTests(){

        Console.WriteLine("Running Object equalityTest");

        RunObjectEqualityTest();

        Console.WriteLine("Running Object property test");

        RunObjectPropertyTest();

        Console.WriteLine("Running Alt Constructor test");

        RunAltConstructorTest();

        Console.WriteLine("Running Little add test");

        RunLittleAddTest();

    }

    public void RunObjectEqualityTest(){

        var failed = false;

        try {

            BigNumber num1 = new BigNumber() { numbers = new List<int>() { 1 }};

            BigNumber num2 = new BigNumber() { numbers = new List<int>() { 1, 2 }};

            Assert.AreNotEqual(num1, num2);

            BigNumber num3 = new BigNumber() { numbers = new List<int>() { 2, 3 }};

            BigNumber num4 = new BigNumber() { numbers = new List<int>() { 2, 3 }};

            Assert.AreEqual(num3, num4);

        } catch (Exception e) {

            failed = true;

        }

​

        if (failed) {

            Console.WriteLine("\t Test Failed");

        } else {

            Console.WriteLine("\t Test Passed");

        }

    }

    public void RunObjectPropertyTest() {

        var failed = false;

        try {

            BigNumber num1 = new BigNumber() { numbers = new List<int> { 1 }};

            Assert.AreEqual(1, num1.numbers[0]);

        } catch (Exception e) {

            failed = true;

        }

​

        if (failed) {

            Console.WriteLine("\t Test Failed");

        } else {

            Console.WriteLine("\t Test Passed");

        }

    }

    public void RunAltConstructorTest(){

        var failed = false;

        try {

            BigNumber num1 = new BigNumber() { numbers = new List<int> { 3, 4 }};

            BigNumber num2 = new BigNumber(num1);

            Assert.AreEqual(num1, num2);

        } catch (Exception e) {

            failed = true;

        }

​

        if (failed) {

            Console.WriteLine("\t Test Failed");

        } else {

            Console.WriteLine("\t Test Passed");

        }

    }

    public void RunLittleAddTest(){

        var failed = false;

        var failedMessage = "";

        try {

            BigNumber num1 = new BigNumber() { numbers = new List<int>{ 1 }};

            BigNumber num2 = new BigNumber() { numbers = new List<int>{ 2 }};

            num1.Add(num2);

            Assert.AreEqual(3, num1.numbers[0]);

        } catch (Exception e) {

            failed = true;

            failedMessage = e.Message;

        }

​

        if (failed) {

            Console.WriteLine("\t Test Failed: " + failedMessage);

        }

    }

}

​

public static class Assert {

    public static bool AreEqual (object expected, object actual) {

        if (expected.Equals(actual)) {

            return true;

        }

        throw new AssertFailException(expected, actual);

    }

    public static bool AreNotEqual (object expected, object actual) {

        if (!expected.Equals(actual)) {

            return true;

        }

        throw new AssertFailException(expected, actual);

    }

}

​

public class AssertFailException : Exception {

    public AssertFailException(object expected, object actual) : base("Expexted '" + expected.ToString() + "' but was '" + actual.ToString() + "'"){

    }

}